Variable-speed mechanism.



H. W. SGHATZ.

VARIABLE SPEED MECHANISM.

APPLIoATIoN HLHD D110. 2a. 190s.

946,073. Patented Jan. 11,1910.

l 9.4L [NI/5 TOR.

UNITED STATES PATENT OFFICE.

HERMAN W. SCHATZ, OF CINCINNATI. OHIO. ASSIGNOR T THE AMERICAN TOOLWORKS COMPANY. OF HAMILTON, OHIO. A CORPORATION OF WEST VIRGINIA.

VARIABLE-SPEED MECHANISM.

To (1U 'whom 'it may( concern:

lie it known that I.y l'lnmmx IV. Serrara. a citizen of the UnitedStates. residing at Cincinnati, in the county of Hamilton and State ofOhio, have invented certainl new and useful Improvements inVariable-Speed Mechanism, of which the following is a specification.

My invention relates to an improvement in variable speed s vstei'ns.

The object of my invention is to provide a system of gearing havingalternately shiftable clutch devices for producing a fariety of speedchanges.

The features of my invention are more fully set forth in the descriptionof the aceonipanying drawings, forming a part of this specification. inwhich Figure 1 is a section on line a5, fr, Fig. 8. Fig. 2 is a sectionon line te, fw, Fig. 1. Fig. 3 is a top plan view of my Variable speedsystem of gearing, illustrated as applicable to a head-stock of a lathe.Fig. t is a section on line y. y. Fig. 3. Fig. 5 is an end elevation ofthe friction clutch. Fig. 6 is a central vertical section through aportion of the same.

1 represents the casing provided with bearings for supporting thevarious shafts employed in the system.

2 represents the driving shaft, and 3 a pulley fixed thereto for drivingthe same.

'fle represents a sleeve loose on shaft Q, carrying gan-s 5. (.y and T,fixed thereto.

S represents a friction clutch member fixed on sleeve and t) representsa friction elnteh member keyed on shaft 2, whereby the friction clutchmember and sleeve 4: may be fixed to the shaft 2. The friction clutchemployed constructed in a well known manner in which the member 9carries a swinging' arm 40 adapted to engage against the friction ringL11 seated between a flange projecting from the member 8 and member 9.

LQ represents a collar adapted to engage the free end of the arm i() forlocking the ring 41 into frietional contact with the member 8. The ringis secured to the member f) by a key Li3, the collar i2 being suitablyactuated by lever mechanism, not shown.

l() represents the driven shaft or spindle. provided with a sleeve 11loose thereon.

1Q represents a gear loose on sleeve 11 and in mesh with a gearSpecification of Letters Patent.

Application filed December 28, 1908.

Patented Jan. 11. 1910.

serial No. 469.570.

lil represei'its` a gear likewise loose on sleeve ll and in mesh withgear (3.

il represents a clutch member slidably fixed to sleeve .11, providedwith teeth adapted to engage alternately with the teeth 15 and 1G ofgears 1Q and 13 respectively.

17 represents a gear fixed to the sleeve 11, and 18 represents' a gearloose on shaft 10.

1S) represents a clutch member slidably fixed to shaft 10. provided withteeth to alternately engage with teeth Q0, El. formed on gears 1T and 1Srespectively. whereby either one of the gears may be clutched to theshaft 10.

represents a` gear fixed to shaft Q3 and in mesh with gear 17. and Q4represents a gear fixed on shaft Q9 and in mesh with gear 18.

ly throwing clutch member lll into engagement with the teeth` 2U of gear1i'. a given speed to shaft 1t) can be obtained through a` giron trainof the system; and by throwing clutch 19 into engagement with the teethQ1 of gear 1S a second speed is produced without changing the drivingrelation of the remainder of gears of the system. In other words, twospeed effects can be produced at this point for each train of thesystem. represents a` rod loosely supporting the sleeve E2G. 27. 2S,represent gears loose on sleeve QG in mesh with gears 5 and 7respectively.

29 represents a shifting clutch member provided with teeth adapted toalternately engage with the teeth 8U and 31. formed on the gears 2T andrespectively. whereby either one of the gears may be clutched to thesleeve 2G.

3Q represents a gear fixed on sleeve Lt in mesh with a gear 325 tixed onshaft E2.

It is obvious that clutch members E) and Q9 may be provided with means.not shown, whereby clutch member 2f) will automatically be moved to itsintermediate or idle position when elutch member il is moved to itsactive position. and rice versa, this being merely as an element ofsafety to prevent two different trains of gears from being clutched toshaft 2 at the same time.

By the system of gearing herein shown, twelve changes of speed can beimparted to the shaft 10.y through the following trains:-

1. Throwing clutch member t) into clutching position with clutch memberS, connecting sleeve t with shaft Q, and throwing clutch member tft intoengagement with,

gear 12, and clutch member 19 into engagement with gear 1T, motion willthence be imparted from shaft 2 through clutch mem bers H. 9, sleeve l,gears and 12, to sleeve 11, to shaft lll, through clutch member 19 andgear 1T.

2. Throwing clutch 19 into engagement with gear 1H with the remainder ofclutches in the position described for the first change. produces a backgear effect to shaft 1t), through gears 1T, 22, 2l and lts.

3. Leaving clutch member 9 in position and throwing clutch members lland 19 into engagement with gears 13 and 1T, places the following trainin commission Shaft :2, clutch members ts and 9, sleeve 4. gears t and123, sleeve 11 and clutch member 19, through gear 1i' to shaft 10.

l. The fourth change is brought about by throwing clutch member 19 intoengagement with gear 15, bringing the train of gears 1T, .22, 21. and 1Hinto commission.

f. Releasing clutch member 9 and throw ing clutch member 29 intoengagement with gear 2T, and clutch members 14- and 19 with gears 12 and17 respectively, places gears 33, 32, 2T, 5 and 12 into driving relationwith shaft 10.

(i. Shifting clutch 19 into engagement with gear 1S brings intoconnnission the back gear speed for the fifth train.

i'. `Shifting clutch member it into engagement with gear 13 and thcremainder of clutches in position described for producing the fifthchange, will impart motion from shaft 3, tln'ough gears 253, 32, 2T, 5.t3. and 12S to shaft 1U through clutch mem ber 19.

S. Shifting clutch member 19 into e11- gagement with gear 1H producesthe alternate baclt gear effect for the seventh train.

9. The ninth change is produced by shifting clutch member 29 intoengagement with gear 2S. clutch member 14 with gear 125, and clutchmember 19 with gear 1T, whence the motion will be from shaft L throughgears 325, 3;). 2H, T, l, 125, to shaft ltl.

10. Shifting clutch member 19 into engagement with gear 1H. produces thebaclt gear speed for the ninth change.

11. Shifting clutch member 2t into engagement with gein-,128, clutchmember tt with gear 12, and clutch member t9 with gear 1T. produces theeleventh change from shaft 2 through gears lili, 32. 2H, i", 112, toshaft lll.

12. Bringing the bach gear train into commission for the change.

l'la ving described my invention, l claim y 1. A variable speed systemof gearingi comprising a driving shaft, a fixed and a series of loosegears thereon, clutching de i vices for clutching said loose gears tosaid shaft, a second shaft, a fixed aml a series of loose gears thereonin mesh respectively with the gears on said first shaft, means forclutching said loose gears severally to said shaft, a third shaft, anddriving connection between one of said loose gears on said first shaftand third shaft, whereby by shifting the clutches three changes of speedmay be obtained to said third shaft, substantially as described.

f'. ln a variable speed system of gearing, a first shaft, a series ofgears in driving re lation with each other and loose on said shaft, asecond shaft, a pair of gears loose thereon, clutching devices foralternately clutching one of said gears to said second shaft, a secondpair of gears loose upon said second shaft in mesh with two of the gearsrespectively on said first shaft, clutching devices for alternatelyclutching either one of said second pair of gears to one of said firstpair of gears. an intermediate shaft and pair of gears in mesh with saidfirst pair of gears respectively on said second shaft, a gear fixed tosaid first shaft, a third shaft, a gear fixed to said third shaft inmesh with said fixed gear on the first shaft, a pair of gears loose onsaid third shaft in mesh with two of the gears loose on the fi t shaft,and clutching devices for clutching either one of said gears to saidthird. shaft, whereby thro-ugh they shifting of said clutches fourprimary and four secondary speed changes can bc obtained, substantiallyas described.

3. A variable speed system of gearing comprising four sha fts, loose andfixed gears on two of said shafts, and clutching devices for alternatelyclutching said loose gears to their respective shafts, a series of loosegears on the third shaft, clutching devices for alternately engagingsaid gears in driving relation with each other and said shaft, and twogears fixed on said fourth shaft in mesh with two of the gears on saidthird shaft, whereby twelve changes of speed may be imparted to one ofsaid shafts by shifting said clutches, substantially as described.

t. A variable speed system of gearing, comprising a driving shaft, asleeve concentric with said driving shaft, a series of gears fixed onsaid sleeve, means for connecting said sleeve to said driving shaft, asecond shaft, a series of loose gears thereon in mesh respectively withthey gears on said sleeve, means for severally connecting said gears tosaid second shaft, intel-meshing gears fixed respectively on saiddriving and said second shafts, whereby several changes of speed and onedirect drive may be imparted to said sleeve, substantially as described.

In testimony whereof, l have hereunto set my hand.

llltlltM it'. h'tllTZ. fitnessesi (haven li. Kwismt, S. linen.

